A rifle-wielding gunman opened fire on a GOP baseball practice in Alexandria, Virginia Wednesday morning.

House Majority Whip Rep. Steve Scalise, who was shot in the hip, was in critical condition after surgery, an aide said. Also taken to hospitals with gunshot wounds were a U.S. Capitol police officer, a congressional staffer and a lobbyist, the statement said.

A second, unidentified, member of Congress was taken to a hospital after suffering minor injuries, according to a joint federal law enforcement statement.

The shooter was identified as 66-year-old James Hodgkinson from Illinois, according to the FBI.

AP Photo

Scalise's office says that prior to entering surgery, the congressman was in good spirits and that he spoke with his wife over the phone. A visibly emotional House Majority Leader Kevin McCarthy told The Washington Post that Scalise is now out of surgery.

The hospital later confirmed that Rep. Steve Scalise was still in critical condition Wednesday night and would need more operations after shooting.

Rep. Mo Brooks of Alabama was on the field at the time and says at least 50 shots had been fired.

Rep. Mike Bishop, R-Mich., said Scalise was standing on second base when he was shot.

“I was looking right at him,” Bishop told Detroit radio station WWJ. “He was a sitting duck.”

Sen. Jeff Flake, who was at the baseball practice, told reporters he called Scalise's wife to alert her of the situation.

CNN obtained video of the shooting. The dramatic video captured gunshots ringing out in the Virginia park.

WARNING: This video contains disturbing audio

The video films several minutes of the carnage, with one man seen lying on the ground at one point.

Scalise is the No. 3 House Republican leader. He was first elected to the House in 2008 after serving in the state legislature.

Gov. John Bel Edwards of Louisiana, Scalise's home state has released a statement calling the shooting an "outrageous, cowardly attack."

South Carolina Congressman Jeff Duncan says the shooter asked him if the politicians on the field were Democrats or Republicans. Duncan replied that they were Republicans, and the man thanked him before turning away. Duncan left before the attack began.

Four other people were injured in the shooting. Congressional aide Zach Barth, lobbyist Matt Mika, along with two U.S. Capitol police officers David Bailey and Krystal Griner.

Please keep the member of my staff and all members of the congressional baseball team in your thoughts and prayers pic.twitter.com/wH4b6wXQhs

The Federal Bureau of Investigation will take charge of the investigation into the shooter.

FBI Special Agent in Charge Tim Slater says it is too early to determine if the Congress members were targeted by the shooter, or if the shooting was a part of an assassination attempt.

The FBI’s statement said they are still working to investigate Hodgkinson and any associates that might exist. FBI continued saying they would look into his social media impressions and any potential motivations.

House Speaker Paul Ryan also tweeted his support those those injured in the shooting saying, "The hearts of the whole house are with Steve Scalise, the brave Capitol police, staff, and all those who were in harm's way."

This morning the hearts of the whole House are with @SteveScalise, the brave Capitol police, staff, and all those who were in harm's way.

The White House says Pence has spoken with the Speaker of the House, House Majority Leader, Rep Joe Barton, Senator Jeff Flake and Francis Brooke, a member of the Vice President's staff and a coach on the GOP baseball team who was present.

Karen & I are praying for @SteveScalise, the Capitol Police, & all hurt for a speedy recovery. Our hearts are with them & their loved ones.